tmp: Added 'move' constructor to simplify return of unchanged 'tmp' arguments.

src/OpenFOAM/memory/tmp/tmp.H

@@ -92,6 +92,9 @@ public:
         //- Construct copy and increment reference count
         inline tmp(const tmp<T>&);
 
+        //- Construct copy moving content, does not increment reference count
+        inline tmp(const tmp<T>&&);
+
         //- Construct copy transferring content of temporary if required
         inline tmp(const tmp<T>&, bool allowTransfer);
 

src/OpenFOAM/memory/tmp/tmpI.H

@@ -91,6 +91,19 @@ inline Foam::tmp<T>::tmp(const tmp<T>& t)
 }
 
 
+template<class T>
+inline Foam::tmp<T>::tmp(const tmp<T>&& t)
+:
+    type_(t.type_),
+    ptr_(t.ptr_)
+{
+    if (isTmp())
+    {
+        t.ptr_ = 0;
+    }
+}
+
+
 template<class T>
 inline Foam::tmp<T>::tmp(const tmp<T>& t, bool allowTransfer)
 :